Diatomella balfouriana Greville, 1855 (uncertain > unassessed )
Diatomella balfouriana f. balfouriana
Diatomella balfouriana f. constricta Krasske, 1930 accepted as Diatomella balfouriana var. constricta Krasske in Hustedt, 1930
Diatomella balfouriana var. angustarea Maillard validated by Moser, Steindorf & Lange-Bertalot, 1995 (uncertain > unassessed )
Diatomella balfouriana var. constricta Krasske in Hustedt, 1930 (uncertain > unassessed )
Diatomella hustedtii Manguin in Bourrelly & Manguin, 1954 (uncertain > unassessed )
Diatomella lecohui Gerd Moser (uncertain > unassessed )
Diatomella minuta Hustedt in Schmidt et al., 1936 (uncertain > unassessed )
Diatomella ouenkohana Maillard validated by Moser, Steindorf & Lange-Bertalot, 1995 (uncertain > unassessed )
Diatomella parva Manguin ex Kociolek & Reviers, 1996 (uncertain > unassessed )
Diatomella salina M.Voigt, 1957 (uncertain > unassessed )
Diatomella salina var. brevistriata Voigt, 1957 (uncertain > unassessed )
Diatomella salina var. septata (Nikolaev) I.V.Makarova, 1968 accepted as Naviculopsis septata Nikolaev, 1966
Hygropetra balfouriana (Grunow ex Cleve) Krammer & Lange-Bertalot, 2000 (uncertain > unassessed )
Hygropetra balfourianaa (Grunow ex Cleve) K. Krammer & H. Lange Bertalot in K. Krammer, 2000
Hygropetra elongata Krammer & Lange-Bertalot, 2000
Hygropetra gelasina S.Mayama & M.Idei, 2009
Hygropetra inopinata Thomas & Kociolek in Kociolek et al., 2014
Oestrupia bicontracta (Østrup) Lange-Bertalot & Krammer in Krammer & Lange-Bertalot, 1985 accepted as Navicula bicontracta Østrup, 1902
Oestrupia boryana (Pantocsek) Jurilj
Oestrupia boryana var. boryana (Pantocsek) Jurilj, 1957 accepted as Navicula boryana Pantocsek, 1889
Oestrupia boryana var. latior Jurilj, 1957 (uncertain > unassessed )
Oestrupia boryana var. sussedana Jurilj, 1957 (uncertain > unassessed )
Oestrupia ergadensis (Gregory) A. Witkowski, H. Lange-Bertalot & D. Metzeltin, 2000 accepted as Pinnularia ergadensis Gregory, 1856
Oestrupia eugeniae (Cleve) Hustedt, 1935 (uncertain > unassessed )
Oestrupia galapagensis (Cleve) Hustedt, 1935 (uncertain > unassessed )
Oestrupia grandis M.K. Hein & B.M. Winsborough, 2001 (uncertain > unassessed )
Oestrupia interrupta Schrader, 1969 (uncertain > unassessed )
Oestrupia kinkeriana (Truan) Hustedt, 1935 accepted as Caloneis kinkeriana (Pantocsek) Cleve, 1894 accepted as Caloneis kinkeriana Truan in Cleve, 1892
Oestrupia lineata Schrader, 1969 (uncertain > unassessed )
Oestrupia madagascarensis (Cleve) Schrader, 1971 (uncertain > unassessed )
Oestrupia musca (Gregory) Hustedt, 1935 accepted as Navicula musca f. musca Gregory, 1857
Oestrupia powelli (Lewis) Heiden ex Hustedt, 1935 accepted as Navicula powellii var. powellii Lewis, 1862
Oestrupia powellii (Lewis) Heiden ex Hustedt, 1935
Oestrupia powellii var. bartholomei (Cleve) F.W. Mills, 1934 accepted as Navicula bartholomei Cleve, 1878
Oestrupia powellii var. egyptiaca (Greville) Heiden in Schmidt et al., 1906 accepted as Navicula egyptiaca Greville, 1866
Oestrupia powellii var. galapagensis (Cleve) F.W. Mills, 1934 accepted as Navicula powelli var. galapagensis Cleve, 1881
Oestrupia powellii var. powellii (Lewis) Heiden in Schmidt et al., 1906 accepted as Navicula powellii var. powellii Lewis, 1862
Oestrupia powellii var. vidovichii (Grunow) Heiden in Schmidt et al., 1906 accepted as Navicula vidovichii Grunow in litteris, 1863
Oestrupia problematica (Azpeitia y Moros) F.W. Mills, 1934 (uncertain > unassessed )
Oestrupia quadriseriata (Cleve & Gruno) Heiden ex Hustedt, 1935 accepted as Navicula quadriseriata Cleve & Grunow in Cleve, 1881
Oestrupia schmidtii Heiden (uncertain > unassessed )
Oestrupia supergradata (Brun) Hendey, 1964 accepted as Navicula supergradata Brun, 1891
Oestrupia witti (Grunow) Giffen, 1980 accepted as Navicula wittii Grunow in Cleve, 1881
Oestrupia zachariasi (Reichelt) Hustedt, 1950 accepted as Navicula zachariasi Reichelt, 1903
Oestrupia zachariasi var. undulata (Schulz) Stoermer & Yang, 1969 accepted as Caloneis baltica var. undulata Schulz, 1926
Oestrupia zanardiniana (Grunow) Schrader, 1971 accepted as Navicula zanardiniana Grunow, 1860
Pinnularia abaujensis (Pantocsek) R.Ross, 1947
Pinnularia abaujensis var. lacustris K.E. Camburn & D.F. Charles, 2000 (uncertain > unassessed )
Pinnularia abaujensis var. linearis (Hustedt) R.M.Patrick, 1966 accepted as Pinnularia gibba var. linearis Hustedt, 1930
Pinnularia abaujensis var. rostrata (R.M.Patrick) R.M.Patrick, 1966 accepted as Pinnularia gibba var. rostrata R.M.Patrick, 1945
Pinnularia abaujensis var. subundulata (Mayer) R.M.Patrick, 1966 (uncertain > unassessed )
Pinnularia abbreviata (A.Cleve) A.Cleve, 1955 accepted as Pinnularia biclavata var. abbreviata Cleve-Euler, 1922
Pinnularia abnormis Skvortzow, 1937 (uncertain > unassessed )
Pinnularia absita M.H.Hohn & J.Hellerman, 1963 (uncertain > unassessed )
Pinnularia acidicola B. van de Vijver & R. Le Cohu, 2002 (uncertain > unassessed )
Pinnularia acidicola var. elongata B. van de Vijver & R. Le Cohu, 2002 (uncertain > unassessed )
Pinnularia acidobionta A.Tuji & T.Wanatabe, 2003 (uncertain > unassessed )
Pinnularia acidojaponica M. Idei & H. Kobayasi in M. Idei & S. Mayama, 2001 (uncertain > unassessed )
Pinnularia acidophila Hofmann & K.Krammer, 2000 (uncertain > unassessed )
Pinnularia acidophila var. baetica I.Ãlvarez-Blanco, C.Cejudo-Figueiras & S.Blanco, 2013
Pinnularia acorica K.Krammer & D.Metzeltin, 2000 (uncertain > unassessed )
Pinnularia acoricola Hustedt, 1934 (uncertain > unassessed )
Pinnularia acoricola var. acoricola Hustedt in Schmidt et al., 1934 (uncertain > unassessed )
Pinnularia acoricola var. amphigomphus Negoro, 1944 (uncertain > unassessed )
Pinnularia acoricola var. cuneiformis Negoro, 1944 (uncertain > unassessed )
Pinnularia acoricola var. elongatirhombica Wydrzycka (uncertain > unassessed )
Pinnularia acoricola var. lanceolata Hustedt, 1934 (uncertain > unassessed )
Pinnularia acoricola var. linearis Wydrzycka (uncertain > unassessed )
Pinnularia acoricola var. osoresanensis Negoro, 1944 (uncertain > unassessed )
Pinnularia acoricola var. pumilio Wydrzycka (uncertain > unassessed )
Pinnularia acoricola var. rostellata (Hustedt) K.Krammer, 2000 accepted as Pinnularia rostellata Hustedt, 1934
Pinnularia acoricolatoba Kulikovskiy, Lange-Bertalot & Metzeltin, 2010 (uncertain > unassessed )
Pinnularia acrosphaeria Rabenhorst, 1853 (uncertain > unassessed )
Pinnularia acrosphaeria W.Smith, 1853
Pinnularia acrosphaeria f. acrosphaeria (Brébisson) W. Smith, 1853 accepted as Frustulia acrosphaeria Brébisson, 1838
Pinnularia acrosphaeria f. genuina Cleve, 1895 (uncertain > unassessed )
Pinnularia acrosphaeria f. genuina Mayer, 1913 (uncertain > unassessed )
Pinnularia acrosphaeria f. hankensis (Skvortzow) (uncertain > unassessed )
Pinnularia acrosphaeria f. hankensis Skvortzow, 1929 (uncertain > unassessed )
Pinnularia acrosphaeria f. interrupta Cleve-Euler, 1955 (uncertain > unassessed )
Pinnularia acrosphaeria f. laevis (M. Peragallo & Heribaud in Heribaud) Cleve, 1895 accepted as Navicula acrosphaeria var. laevis M.Peragallo & Héribaud-Joseph, 1893
Pinnularia acrosphaeria f. maxima Cleve, 1895 (uncertain > unassessed )
Pinnularia acrosphaeria f. minor Cleve, 1895 (uncertain > unassessed )
Pinnularia acrosphaeria f. minor Frenguelli, 1933 (uncertain > unassessed )
Pinnularia acrosphaeria f. minor Otto Müller, 1910 (uncertain > unassessed )
Pinnularia acrosphaeria f. minor Skvortzow, 1936 (uncertain > unassessed )
Pinnularia acrosphaeria f. turgidula Grunow ex Cleve, 1895 (uncertain > unassessed )
Pinnularia acrosphaeria f. undulata (Cleve) Hustedt, 1930 accepted as Pinnularia acrosphaeria var. undulata Cleve, 1895
Pinnularia acrosphaeria var. americana (Tempère & Peragallo) Frenguelli, 1933 accepted as Navicula acrosphaeria var. americana Tempère & Peragallo, 1913
Pinnularia acrosphaeria var. americana f. minor J.Frenguelli, 1933 (uncertain > unassessed )
Pinnularia acrosphaeria var. asiatica Hirano, 1967 (uncertain > unassessed )
Pinnularia acrosphaeria var. bacillaris (Heribaud) F.W. Mills, 1934 accepted as Navicula acrosphaeria var. bacillaris Héribaud, 1903
Pinnularia acrosphaeria var. badeana (Heribaud & M. Peragallo in Heribaud) F.W. Mills, 1934 accepted as Navicula acrosphaeria var. badeana Héribaud & M. Peragallo in Héribaud, 1902
Pinnularia acrosphaeria var. controversa Cholnoky, 1958 (uncertain > unassessed )
Pinnularia acrosphaeria var. dilata (M. Peragallo in Tempère & Peragallo) F.W. Mills, 1934 (uncertain > unassessed )
Pinnularia acrosphaeria var. dilatata (M. Peragallo in Tempère & Peragallo) F.W. Mills, 1934 accepted as Navicula acrosphaeria var. dilatata M. Peragallo in Tempère & Peragallo, 1908
Pinnularia acrosphaeria var. dubia Guermeur, 1954 (uncertain > unassessed )
Pinnularia acrosphaeria var. ecuatoriana De Oliveira & Steinitz-Kannan, 1992 (uncertain > unassessed )
Pinnularia acrosphaeria var. elongata (Heribaud) F.W. Mills, 1934 accepted as Navicula acrosphaeria var. elongata Héribaud, 1903